package thread;

public class SyncDemo3 {
    public static void main(String[] args) {
        Foo f1 = new Foo();
        Foo f2 = new Foo();
        Thread t1 = new Thread() {
            public void run() {
                f1.dosome();
            }
        };
        Thread t2 = new Thread() {
            public void run() {
                f2.dosome();
            }
        };
        t1.start();
        t2.start();
    }
}

class Foo {
    //  public synchronized  static void dosome() {
    public static void dosome() {
        synchronized (Foo.class) {
            try {
                Thread t = Thread.currentThread();
                System.out.println(t.getName() + "正在执行dosome方法");
                Thread.sleep(5000);
                System.out.println(t.getName() + "执行dosome方法完毕");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}